collision

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Computers A garbled communication between 2 devices in a local area network (LAN) that results when both attempt to transmit data simultaneously; after colliding, each device waits for a period of time and retries; increased devices on a LAN increase the likelihood of collision
Obstetrics A mechanical obstruction to the birth of twins, such that the lay of one foetus impedes the engagement of the other; the most extreme collision is known as interlocking
Public health Road traffic accident/motor vehicle accident
Radiation physics The interaction between 2 particles—e.g., photons, atomic nuclei, electrons—during which energy, momentum, and charge may be altered

collision

Obstetrics A mechanical obstruction to the birth of twins, such that the lay of one fetus impedes the engagement of the other; the most extreme collision is known as interlocking, see there Public health Motor vehicle accident. See MVA.
References in periodicals archive ?
In this figure, we label the most important emission lines used in our studies, in particular, the strong Balmer hydrogen recombination lines and collisionally excited emission lines, such as [O II] [lambda][lambda]3726,3729, [O III] [lambda]4363, [O III] [lambda]5007, [S II] [lambda][lambda]6717,6731, and [N II] [lambda]6584, which have been used for the determination of physical conditions (e.g., electron temperature and density) and chemical abundances (e.g., oxygen, nitrogen, etc.).
Collisionally activated dissociation of 17-OHP yielding products at m/z 97.0 and m/z 109.1 has been reported (9); our instrument tuning algorithm favored the m/z 331.2 to 97.0 transition.
He relates a theory that hundreds of bodies larger than Ceres, perhaps as large as Mars, may have existed in the early asteroid belt, without pointing out that presumably all of these bodies were ejected, intact, from the solar system (they're too big to have been collisionally fragmented into smaller pieces).
In addition the design of the electrospray ion source can permit a molecular ion to undergo a process known as collisionally induced decomposition.
The optimization included collisionally activated dissociation MS/MS, which was performed in the second quadrupole with nitrogen at 0.06 kPa as collision gas.